Facebook
X
Pinterest
Copy Link
Why did my Houston mortgage payment go up after the first year?
Your Houston mortgage payment can jump in year two because your property taxes and escrow account catch up with the real value of the home.
When you first buy, your monthly payment may be based on the previous owner’s lower taxable value.
Or, if you bought new construction, it may be based on the land value before the completed home is fully assessed.
Then the appraisal district reassesses the property.
The previous owner’s exemptions drop off.
Your tax bill increases.
Your escrow account may run short.
And your lender raises your monthly payment to cover both the higher bill and the shortage.
It can feel like a shock.
But it is usually predictable.
And it is something you can plan for before you ever close.
By Shian Munro, Realtor® | Coldwell Banker Realty
Published: June 10, 2026
The Payment Jump That Surprises Buyers
One Houston couple saw their monthly mortgage payment rise from about $1,700 to more than $3,200 after their home’s appraised value changed from roughly $225,000 to over $470,000.
They had not refinanced.
They had not changed loans.
Their property taxes caught up with the value of the home.
Their escrow account ran short.
And their lender adjusted the payment.
This is one of the most misunderstood parts of Houston homeownership.
It often shows up in the first or second year.
And in a high-tax market like Harris County, the change can be significant.
How Your Monthly Mortgage Payment Works
If your mortgage has an escrow account, your monthly payment usually includes four parts.
Principal.
Interest.
Taxes.
Insurance.
You may hear this called PITI.
With a standard fixed-rate loan, the principal and interest stay the same.
But taxes and insurance can change.
Your lender estimates your annual property taxes and homeowners insurance.
Then they divide that amount by twelve and collect it as part of your monthly payment.
That money sits in an escrow account.
When your tax bill or insurance bill comes due, the lender pays it from that account.
The problem is that the lender is working from an estimate.
If the estimate is too low, the escrow account runs short.
Then the lender has to fix it.
Usually, that happens in two ways.
First, they collect the shortage.
That may be paid as a lump sum or spread over the next twelve months.
Second, they raise the ongoing monthly payment so the account does not fall short again.
That is why the jump can feel so steep.
You are not just paying the higher tax bill.
You are also catching up on the shortage.
Why Houston Payments Can Spike
There are two common reasons this happens.
1. You Bought a Home With the Previous Owner’s Exemptions Built In
In Texas, a homestead exemption can reduce a homeowner’s taxable value.
The 10% annual appraisal cap can also keep their taxable value lower than the home’s actual market value.
But those protections belong to the previous owner.
They do not automatically transfer to you.
When you buy the home, the old exemptions drop off.
The appraisal district may then reset the taxable value closer to what you paid.
If the seller owned the home for a long time, their taxable value may have been much lower than market value.
So your first full-year tax bill can be much higher than expected.
2. You Bought New Construction
This one catches a lot of buyers in areas like Katy, Cypress, Bridgeland and other master-planned communities.
When you buy a brand-new home, the appraisal district may not have assessed the finished house yet.
For the first year, the property may be taxed on the land only.
That can make the payment look lovely at the beginning.
Then the completed home is added to the tax roll.
The taxable value increases.
And suddenly the escrow account is thousands of dollars behind.
If the home is in a community with a MUD tax, the year-two adjustment can feel even bigger.
That is why new construction buyers need to look beyond the first-year payment.
What the Numbers Can Look Like
Property tax rates in the Houston area often include school, county and, in some communities, MUD taxes.
Those rates can turn a reassessment into a real monthly difference.
For example, on a $600,000 home:
If the home is taxed at $400,000 with a 2.5% tax rate, the tax bill would be about $10,000 a year.
That is roughly $833 a month for the tax portion of the payment.
If the home is reassessed at $600,000 with the same 2.5% rate, the tax bill would be about $15,000 a year.
That is roughly $1,250 a month.
That is a difference of about $417 a month from taxes alone.
And that is before any escrow shortage repayment or homeowners insurance increase is added.
So yes, the number can move quickly.
How to Plan Before You Close
You cannot stop a reassessment.
But you can plan for it.
This is one of the things I talk through with buyers before we write an offer.
Especially if they are relocating, buying new construction, or buying in a high-tax community.
Budget for the fully assessed value
Do not rely only on the seller’s current tax bill.
And do not rely only on the builder’s first-year estimate.
Instead, look at what the taxes may be once the home is assessed at its full value.
That gives you a more realistic monthly payment.
Ask how your escrow is being set up
Ask your lender what value they are using to set up your escrow account.
Are they using the current taxable value?
Or are they using the improved value?
That difference matters.
Getting the answer in writing can help avoid confusion later.
File your homestead exemption
After you close, file your Texas homestead exemption if the home is your primary residence.
This can lower your taxable value.
It can also help limit future appraisal increases.
It is one of the simplest steps a homeowner can take.
Protest your property value each year
In Harris County, the property tax protest deadline is May 15.
A successful protest may reduce the value your taxes are based on.
That may also affect your escrow payment.
Keep a reserve
It is wise to keep a little extra set aside.
That way, if your lender asks for a shortage payment, you are not scrambling.
Even if the shortage is spread over twelve months, it can still affect your monthly budget.
Why This Matters in Houston
Houston buyers need to understand the full payment.
Not just the first payment.
That is especially true if you are moving here from the UK, another state, or another country.
The way Texas handles property taxes can feel unfamiliar.
And the first-year number is not always the real long-term number.
This is also why online estimates can be misleading.
Texas is a non-disclosure state, so sold prices are not public in the same way they are in some other places.
As a Realtor®, I can use MLS data and local tax information to help buyers look at a more realistic cost picture before they make an offer.
That does not remove every unknown.
But it does help you avoid being completely blindsided.
Frequently Asked Questions
Why did my escrow payment go up if my interest rate is fixed?
A fixed interest rate only fixes the principal and interest part of your payment.
Taxes and insurance can still change.
If your lender reviews the escrow account and finds a shortage, your monthly payment may increase.
How much can my Houston property taxes increase after I buy?
It depends on the previous owner’s taxable value, the purchase price and whether the home was fully assessed.
If the taxable value increases significantly, the annual tax bill can increase by thousands of dollars.
That increase then affects the escrow portion of your mortgage payment.
Is the year-two payment jump worse on new construction?
It can be.
New construction may be taxed on land only during the first year.
Once the completed home is assessed, the taxable value can rise sharply.
This is common in master-planned communities, especially where MUD taxes apply.
Can I avoid an escrow shortage?
You may not be able to avoid reassessment.
But you can reduce the surprise.
Budget from the fully assessed value.
Ask your lender how escrow is being calculated.
File your homestead exemption.
Protest your value when appropriate.
And keep a reserve for possible shortages.
Do I have to pay an escrow shortage all at once?
Usually, lenders give homeowners options.
You may be able to pay the shortage as a lump sum.
Or the lender may spread it over the next twelve months.
Either way, your ongoing monthly payment may still increase so the account does not fall short again.
The Bottom Line
The year-two payment jump is not usually a billing error.
And it is not usually because your loan suddenly changed.
It is often the result of property taxes, reassessment and escrow catching up.
The buyers who feel shocked are usually the ones who budgeted from the first-year number.
The buyers who feel prepared are the ones who planned for the fully assessed value from the start.
If you are buying in the Houston area, especially if you are relocating or buying new construction, it is worth looking at the real monthly number before you write an offer.
That way, you know what the payment may look like in year one, year two and beyond.
Book a complimentary consultation through my website.
Shian Munro is a British Realtor® with Coldwell Banker Realty in Houston. She specialises in relocation and luxury homes, helping international and interstate buyers feel confidently at home in Texas.
